water vapor

noun

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)

Examples of water vapor in a Sentence

Recent Examples on the Web

These particles act as seeds on which water vapor condenses to form cloud droplets. — Yunyao Li, The Conversation, 30 July 2026

When the temperature falls low enough, the water vapor in the air begins to condense, forming a cloud above the smoke column. — Tiago Ventura, Time, 29 July 2026

The amount of water vapor in this air mass will reach levels well above average for even midsummer’s humid reputation. — Briana Waxman, CNN Money, 27 July 2026

Using precious metals and chemical reactions, catalytic converters transform harmful carbon monoxide, hydrocarbons and nitrogen oxides into significantly less harmful carbon dioxide, nitrogen and water vapor. — Peter Lyon, Forbes.com, 22 July 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for water vapor

• caper
• paper
• raper
• scraper
• shaper
• taper
• newspaper
• notepaper
• sandpaper
• skyscraper
• wallpaper
• wastepaper

Kids Definition

water vapor

noun

: water in a gaseous form especially when below boiling temperature and spread through the atmosphere

Medical Definition

water vapor

noun

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)